Presidential Clash Threatens Brazil-Argentina Diplomatic Relations

Diplomatic relations between Brazil and Argentina have heated up again. The Brazilian government has decided to downgrade its diplomatic relations with Argentina after President Javier Milei once again made statements insulting President Luiz Inácio Lula da Silva.

Citing Reuters on Wednesday (5/8/2026), a Brazilian government source said relations between the two countries will now be handled only at the level of “chargé d’affaires or temporary diplomatic official” and no longer through ambassadors. The decision was taken after Milei, in an interview with Argentine television station LN+, called Lula a “former convict”, “thief” and “corrupt person”.

As part of the move, Brazil’s Ambassador to Argentina, Julio Bitelli, has been confirmed not to return to his post in Buenos Aires. This also marks the worsening of relations between the two largest economies in Latin America.

Since Milei took office as President of Argentina, the two leaders have never held an official bilateral meeting. Previously, Bitelli was also recalled to Brasília at the end of last month after Milei criticised Lula while attending the campaign launch of Flávio Bolsonaro.

Flávio is the opposition candidate who will challenge Lula in Brazil’s presidential election next October. At the event, Milei openly gave his support to the son of former President Jair Bolsonaro.

The Brazilian government has also formally conveyed the decision to downgrade diplomatic relations to Argentina’s Ambassador in Brasília, Daniel Raimondi. As of the writing of this report, Argentina’s Ministry of Foreign Affairs had not yet responded to the Brazilian government’s decision.

Diplomatic tension between Lula and Milei has actually been ongoing since Argentina’s 2023 election campaign. At that time, Milei frequently levelled harsh criticism at Lula and the left-wing government in Brazil.

After officially taking office as president, relations between the two leaders have remained cold and have shown no signs of improvement. The worsening of relations between Brazil and Argentina could potentially draw the attention of market participants, given that both countries are key members of the Mercosur trade bloc and have close trade ties in the South American region.